In the newest issue of Us Weekly, Lindsay Lohan opens up about her heartbreaking split from Samantha Ronson, the "humiliating" weekend showdown with Ronson's family, and says that friends' fears she is suicidal are unfounded.

"It's absolute hell," Lohan told Us on Monday in a far-ranging interview over several lengthy phone calls and emails in which she was agitated, crying and baffled by the turn of events.

Ronson broke it off with her girlfriend of nearly two years last Friday, and hired five security guards to keep Lohan out of an afterparty for her sister Charlotte at the Chateau Marmont.

"The worst night of my life," Lohan, who was staying one floor above the Ronsons with her mom Dina and sister Ali, tells Us.

The next day, Ronson changed the locks on the Hollywood Hills home she shared with Lohan. On Monday, Ronson's mom and sister asked police about obtaining a restraining order against Lohan, a Beverly Hills police sergeant confirms to Us.

For more on Lohan -- including what she has to say about her rumored affair with Chace Crawford, why friends think she should be institutionalized, and just how broke she really is -- pick up the new issue of Us Weekly, on stands Wednesday.